public bool Decrypt(byte[] encLic)
{
byte[] array = default(byte[]);
try
{
using (Aes aes = Aes.Create())
{
aes.Key = Encoding.ASCII.GetBytes("I'd tell you a joke about UDP, but I'm not sure you'd get it".Substring(0, 32));
aes.IV = this._aesIV;
ICryptoTransform transform = aes.CreateDecryptor(aes.Key, aes.IV);
using (MemoryStream stream = new MemoryStream(encLic))
{
using (CryptoStream cryptoStream = new CryptoStream(stream, transform, CryptoStreamMode.Read))
{
array = new byte[encLic.Length];
cryptoStream.Read(array, 0, array.Length);
}
}
}
}
catch (Exception)
{
array = new byte[0];
return(false);
}
DataContractJsonSerializer dataContractJsonSerializer = new DataContractJsonSerializer(typeof(LicenceRegistryValue));
int num = Array.IndexOf(array, (byte)0);
if (num == -1)
{
num = array.Length;
}
MemoryStream stream2 = new MemoryStream(array, 0, num);
try
{
LicenceRegistryValue licenceRegistryValue = (LicenceRegistryValue)dataContractJsonSerializer.ReadObject(stream2);
this.ProductKey = licenceRegistryValue.Key;
this.LicencedCompany = licenceRegistryValue.Company;
this.LicencedIndividual = licenceRegistryValue.User;
this.EMail = licenceRegistryValue.Email;
this.UniqueMachineID = licenceRegistryValue.UniqueMachineID;
this.Expiry = DateTime.Parse(licenceRegistryValue.Expiry);
this.Type = (UltamationLicenceType)Enum.Parse(typeof(UltamationLicenceType), licenceRegistryValue.Type);
}
catch (Exception)
{
this.SetToUnlicenced();
return(false);
}
return(true);
}
public byte[] Encrypt()
{
DataContractJsonSerializer dataContractJsonSerializer = new DataContractJsonSerializer(typeof(LicenceRegistryValue));
MemoryStream memoryStream = new MemoryStream();
LicenceRegistryValue licenceRegistryValue = new LicenceRegistryValue();
licenceRegistryValue.Key = this.ProductKey;
licenceRegistryValue.Company = this.LicencedCompany;
licenceRegistryValue.User = this.LicencedIndividual;
licenceRegistryValue.Email = this.EMail;
licenceRegistryValue.UniqueMachineID = this.UniqueMachineID;
licenceRegistryValue.Expiry = this.Expiry.ToLongDateString();
licenceRegistryValue.Type = Enum.GetName(typeof(UltamationLicenceType), this.Type);
try
{
dataContractJsonSerializer.WriteObject(memoryStream, licenceRegistryValue);
byte[] buffer = memoryStream.GetBuffer();
using (Aes aes = Aes.Create())
{
aes.Key = Encoding.ASCII.GetBytes("I'd tell you a joke about UDP, but I'm not sure you'd get it".Substring(0, 32));
aes.IV = this._aesIV;
ICryptoTransform transform = aes.CreateEncryptor(aes.Key, aes.IV);
using (MemoryStream memoryStream2 = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream2, transform, CryptoStreamMode.Write))
{
cryptoStream.Write(buffer, 0, buffer.Length);
cryptoStream.FlushFinalBlock();
return(memoryStream2.ToArray());
}
}
}
}
catch (Exception)
{
return(null);
}
}
